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2013

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Full-Text Articles in Physical Sciences and Mathematics

U.S. Drought Monitor, December 31, 2013, Matthew Rosencrans Dec 2013

U.S. Drought Monitor, December 31, 2013, Matthew Rosencrans

US Ag in Drought Archive

Drought map of U.S. for December 31, 2013 (12/31/13) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.


U.S. Drought Monitor, December 24, 2013, Matthew Rosencrans Dec 2013

U.S. Drought Monitor, December 24, 2013, Matthew Rosencrans

US Ag in Drought Archive

Drought map of U.S. for December 24, 2013 (12/24/13) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Hay, Cattle, Winter wheat.


Table Of Contents, Michele Harmon Dec 2013

Table Of Contents, Michele Harmon

Journal of the South Carolina Academy of Science

No abstract provided.


Modelling Animal Waste Pathogen Transport From Agricultural Land To Streams, Pramod K. Pandey, Michelle L. Soupir, Charles D. Ikenberry Dec 2013

Modelling Animal Waste Pathogen Transport From Agricultural Land To Streams, Pramod K. Pandey, Michelle L. Soupir, Charles D. Ikenberry

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

The transport of animal waste pathogens from crop land to streams can potentially elevate pathogen levels in stream water. Applying animal manure into crop land as fertilizers is a common practice in developing as well as in developed countries. Manure application into the crop land, however, can cause potential human health. To control pathogen levels in ambient water bodies such as streams, improving our understanding of pathogen transport at farm scale as well as at watershed scale is required. To understand the impacts of crop land receiving animal waste as fertilizers on stream's pathogen levels, here we investigate pathogen ...


Dose Dependent Effects Of Caffeine On Cognitive Performance And Neuronal Activation, Stephan Albrecht, Helen Morris, Michelle Vieyra Dec 2013

Dose Dependent Effects Of Caffeine On Cognitive Performance And Neuronal Activation, Stephan Albrecht, Helen Morris, Michelle Vieyra

Journal of the South Carolina Academy of Science

Many students assume that the more caffeine you drink, the better your cognitive performance. Over-consumption of caffeine has many negative effects, so if there are no dose related cognitive benefits to large amounts of caffeine, then college students should limit their intake. This study looked at whether ingesting a medium dose (200 mg) versus a lower dose (100 mg) of caffeine improved short term memory as measured by Flanker and n-back tests, compared to a control group. In addition, we looked at whether larger doses of caffeine produced a difference in neuronal activation during these tests as measured by functional ...


Fourier Analysis Of Phase Resetting Curves Of Neural Oscillators, Robert A. Raidt, Sorinel A. Oprisan Dec 2013

Fourier Analysis Of Phase Resetting Curves Of Neural Oscillators, Robert A. Raidt, Sorinel A. Oprisan

Journal of the South Carolina Academy of Science

We investigated the impact of changes in biologically relevant control parameters, such as the shape of an external perturbation or the conductance values of an individual model neuron, on the shape of the phase resetting curve (PRC) of that neuron. For that purpose, PRCs were generated for groups of Morris-Lecar (ML) model neurons with different conductance values but similar firing periods (within 0.005ms) using external rectangular, triangular, or trapezoidal perturbations of varying areas. These PRCs were numerically described and analyzed as a series of coefficient values using a Fourier Discrete Sine Transform (DST). We found that changes in the ...


U.S. Drought Monitor, December 17, 2013, Mark D. Svoboda Dec 2013

U.S. Drought Monitor, December 17, 2013, Mark D. Svoboda

US Ag in Drought Archive

Drought map of U.S. for December 17, 2013 (12/17/13) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.


Base Excision Repair Of Oxidative Dna Damage Coupled With Removal Of A Cag Repeat Hairpin Attenuates Trinucleotide Repeat Expansion, Meng Xu, Yanhao Lai, Justin Torner, Yanbin Zhang, Zunzhen Zhang, Yuan Liu Dec 2013

Base Excision Repair Of Oxidative Dna Damage Coupled With Removal Of A Cag Repeat Hairpin Attenuates Trinucleotide Repeat Expansion, Meng Xu, Yanhao Lai, Justin Torner, Yanbin Zhang, Zunzhen Zhang, Yuan Liu

Department of Chemistry and Biochemistry

Trinucleotide repeat (TNR) expansion is responsible for numerous human neurodegenerative diseases. However, the underlying mechanisms remain unclear. Recent studies have shown that DNA base excision repair (BER) can mediate TNR expansion and deletion by removing base lesions in different locations of a TNR tract, indicating that BER can promote or prevent TNR expansion in a damage location–dependent manner. In this study, we provide the first evidence that the repair of a DNA base lesion located in the loop region of a CAG repeat hairpin can remove the hairpin, attenuating repeat expansion. We found that an 8-oxoguanine located in the ...


Evaluation Of Striped Bass Stocks In Virginia, Monitoring And Tagging Studies, 2010-2014 Progress Report, 1 September 2012 - 31 August 2013, Philip W. Sadler, Matthew W. Smith, John M. Hoenig, Shelley E. Sullivan, Robert E. Harris, Lydia M. Goins Dec 2013

Evaluation Of Striped Bass Stocks In Virginia, Monitoring And Tagging Studies, 2010-2014 Progress Report, 1 September 2012 - 31 August 2013, Philip W. Sadler, Matthew W. Smith, John M. Hoenig, Shelley E. Sullivan, Robert E. Harris, Lydia M. Goins

Reports

This report presents the results of striped bass (Morone saxatilis) tagging and monitoring activities in Virginia during the period 1 September 2012 through 31 August 2013. It includes an assessment of the biological characteristics of striped bass taken from the 2013 spring spawning run, estimates of annual survival and fishing mortality based on annual spring tagging, and the results of the study that documents the prevalence of mycobacterial infections of striped bass in Chesapeake Bay. The information contained in this report is required by the Atlantic States Marine Fisheries Commission and is used to implement a coordinated management plan for ...


Synthesis, Characterization, And Application Of High Surface Area, Mesoporous, Stabilized Anatase Tio2 Catalyst Supports, Rebecca Elizabeth Olsen Dec 2013

Synthesis, Characterization, And Application Of High Surface Area, Mesoporous, Stabilized Anatase Tio2 Catalyst Supports, Rebecca Elizabeth Olsen

Theses and Dissertations

Nanomaterials have attracted substantial attention in the area of catalysis due to the unique properties they exhibit such as high surface areas, intricate pore networks and unique morphologies. TiO2 has attracted attention as a catalyst since the discovery of its high photocatalytic activity by Fuishima and Honda in 1972. Given its high thermal stability, low cost, low environmental impact, and versatility, TiO2 is a widely used commercial catalyst and catalyst support. TiO2 is used in many applications such as photocatalysis is also an excellent support material for noble metals in a number of oxidative synthesis and pollution-control reactions. Though TiO2 ...


Soil Development And Vegetation Response To Removal Of A Small Dam, Lassen Volcanic National Park, California, Stephanie Kay Rohdy Dec 2013

Soil Development And Vegetation Response To Removal Of A Small Dam, Lassen Volcanic National Park, California, Stephanie Kay Rohdy

Dissertations and Theses

Dam removal is increasing as dams age, yet little is understood about the pedogenic response to dam removal. This study reports on the edaphic changes of reservoir sediments and vegetation cover one year following removal of a small earthen dam in Northern California. In August 2012, I sampled surface sediments from the former Dream Lake reservoir in Lassen Volcanic National Park, and compared their physical and chemical properties with soil samples from two reference sites. I also estimated percent cover of vegetation in the former reservoir and reference sites. My results show that the reservoir was under reduced conditions, as ...


Nonlinear Spectroscopic Investigation Of Adsorption To C-18 Model Stationary Phase, Anthony D. Peterson Dec 2013

Nonlinear Spectroscopic Investigation Of Adsorption To C-18 Model Stationary Phase, Anthony D. Peterson

Theses and Dissertations

Reversed-phase liquid chromatography (RPLC) is a commonly used separation technique in chemistry. Nevertheless, the mechanistic interactions at the molecular level among the eluent, analyte, and the stationary phase are not fully understood. Because of this limited understanding, optimization of the separation must be done experimentally. Learning more about molecular interactions should aid in improving separations. We are currently using second-harmonic generation (SHG) spectroscopy to investigate how analytes adsorb to the surface. SHG is a spectroscopic technique that produces signal only at places of non-isotropic symmetry; this typically occurs at surfaces. SHG can be used to produce surface isotherms of test ...


Robinson Point, Belize: An Important Foraging Ground For Endangered Sea Turtles In The Western Caribbean Sea, Linda Searle Dec 2013

Robinson Point, Belize: An Important Foraging Ground For Endangered Sea Turtles In The Western Caribbean Sea, Linda Searle

HCNSO Student Theses and Dissertations

Anecdotal reports, flipper tag returns, satellite migration paths, and above-water and net surveys have identified an important foraging area for sea turtles in the Robinson Point area, 12 kilometers southwest of Belize City. Visual observations confirmed that sea turtles were actively foraging at Robinson Point. Sixteen 30 minute visual observations from stationary and drifting boats made 132 sea turtle sightings from October 2007 through January 2008, with a maximum of 40 sightings made in one survey. In-water capture methodology tested the traditional turtle net, which captured 14 turtles in 63 sets for a success rate of only 22%. There were ...


U.S. Drought Monitor, December 10, 2013, Michael J. Brewer Dec 2013

U.S. Drought Monitor, December 10, 2013, Michael J. Brewer

US Ag in Drought Archive

Drought map of U.S. for December 10, 2013 (12/10/13) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.


Environmental And Socio-Economic Considerations For Aquaculture In Jervis Bay, Nsw, Alyssa Joyce, Ana M. Rubio, Pia C. Winberg Dec 2013

Environmental And Socio-Economic Considerations For Aquaculture In Jervis Bay, Nsw, Alyssa Joyce, Ana M. Rubio, Pia C. Winberg

Dr Pia C Winberg

No abstract provided.


Best Management Practices For Sustaining Yield And Soil Quality, Mahdi Al-Kaisi Dec 2013

Best Management Practices For Sustaining Yield And Soil Quality, Mahdi Al-Kaisi

Proceedings of the Integrated Crop Management Conference

Management and tillage decision is one of several decisions farmers have to make every fall. However, there are many other factors that need to be considered when selecting a tillage system for any given field, or region within the state. Those factors are soil conditions, which include soil slope, soil drainage, topsoil depth or the A-horizon depth. Other equally important factors that need to be considered are hybrid selection, crop rotation, and management factors, such as residue cover, type of residue (corn or soybean), soil moisture condition at the time of making the decision, timing of tillage operation, fertilizer management ...


Establishing And Managing Perennial Grasses For Bioenergy, Rob Mitchell Dec 2013

Establishing And Managing Perennial Grasses For Bioenergy, Rob Mitchell

Proceedings of the Integrated Crop Management Conference

Switchgrass (Panicum virgatum) is native to every U.S. state east of the Rocky Mountains, is the most advanced herbaceous perennial bioenergy feedstock, and best management practices (BMPs) have been developed for bioenergy production in most agro-ecoregions. Additionally, big bluestem (Andropogon gerardii), indiangrass (Sorghastrum nutans), and sideoats grama (Bouteloua curtipendula) are native perennial warm-season grasses and are promising bioenergy feedstocks, especially when planted in low-diversity mixtures. BMPs have been developed for big bluestem, indiangrass, and sideoats grama specifically for the Great Plains and Midwest. Perennial grasses likely will be grown on cropland that is marginally productive for row crops, similar ...


Options For In-Season Adjustment Of Nitrogen Rate For Corn, John E. Sawyer Dec 2013

Options For In-Season Adjustment Of Nitrogen Rate For Corn, John E. Sawyer

Proceedings of the Integrated Crop Management Conference

Periods of wetness and dryness extremes can have dramatic effects on available N supply from soil and loss of applied nitrogen (N) from fertilizer and manure. Such effects can happen quickly, as recently occurred with the large profile nitrate levels in the fall following the drought of 2012 and then the losses with excessive precipitation in the spring 2013. Compared to “normal” moisture and temperature conditions, seasonal differences can significantly reduce or increase needed N applications and cause variation in yearly optimal N rates (Fig. 1). Therefore, opportunity exists for seasonal refinement of N application rate. However, based on analysis ...


Perennial Grasses For Bioenergy In The Central United States: Updates On Economics And Research Progress, Keri Jacobs Dec 2013

Perennial Grasses For Bioenergy In The Central United States: Updates On Economics And Research Progress, Keri Jacobs

Proceedings of the Integrated Crop Management Conference

Through policies and programmatic commitments, the United States is exploring the use of alternative transportation fuels as means to meet the growing global demand for energy and the nation’s RFS targets. The CenUSA Bioenergy project is a five year, multi-state, and multi-disciplinary coordinated research and education effort to develop a sustainable system for the production of biofuel feedstocks derived from perennial grasses on land marginal for row crop production. Now in its 3 year, the project, funded by the USDA under the NIFA-AFRI Sustainable Biofuels Initiative (project #2010-05074), focuses on the production of perennial grasses integrated within the row ...


Optimizing Yield While Minimizing Phosphorus Water Quality Impacts: Some Do’S And Don’Ts, Antonio P. Mallarino Dec 2013

Optimizing Yield While Minimizing Phosphorus Water Quality Impacts: Some Do’S And Don’Ts, Antonio P. Mallarino

Proceedings of the Integrated Crop Management Conference

Public concerns about agriculture impacts on water quality and the likelihood of further regulation have been increasing. The uninformed public and many in regulatory government agencies see reducing fertilization rates as an effective way of reducing nutrient loss from fields and improving water quality, especially when animal manure is applied.


Update To Iowa Phosphorus, Potassium, And Lime Recommendations, Antonio P. Mallarino, John E. Sawyer Dec 2013

Update To Iowa Phosphorus, Potassium, And Lime Recommendations, Antonio P. Mallarino, John E. Sawyer

Proceedings of the Integrated Crop Management Conference

This article highlights revisions to Iowa State University (ISU) soil-test interpretations and application guidelines for phosphorus (P), potassium (K) and lime in the updated ISU extension publication PM 1688 “A General Guide for Crop Nutrient and Limestone Recommendations in Iowa”. The previous update to this publication was in 2002. Field research is conducted as issues or questions arise to assure that nutrient management suggestions are up to date. This research has indicated that some recommendations should not be changed, but that others needed significant changes to optimize nutrient management to improve the profitability and sustainability of crop production.


Energy Management On Iowa Farms, H. Mark Hanna, Dana D. Schweitzer Dec 2013

Energy Management On Iowa Farms, H. Mark Hanna, Dana D. Schweitzer

Proceedings of the Integrated Crop Management Conference

Iowa agriculture spends about one billion dollars annually on the purchase of diesel fuel, electricity, propane, gasoline and natural gas. The actual amount fluctuates with the rise and fall of energy prices.


U.S. Drought Monitor, December 3, 2013, Michael J. Brewer Dec 2013

U.S. Drought Monitor, December 3, 2013, Michael J. Brewer

US Ag in Drought Archive

Drought map of U.S. for December 3, 2013 (12/3/13) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.


Formation And Analysis Of Zinc Oxide Nanoparticles And Zinc Oxide Hexagonal Prisms And Optical Analysis Of Cadmium Selenide Nanoparticles, Jared M. Hancock Dec 2013

Formation And Analysis Of Zinc Oxide Nanoparticles And Zinc Oxide Hexagonal Prisms And Optical Analysis Of Cadmium Selenide Nanoparticles, Jared M. Hancock

Theses and Dissertations

In this dissertation, methods to synthesize ZnO are reported. First, zinc oxide nanoparticles were synthesized with small amounts of transition metal ions to create materials called dilute magnetic semiconductors (DMS). We employed a low temperature sol-gel method that produces ZnO nanoparticles of reproducible size and incorporates cobalt, nickel, and manganese ions into the nanoparticles. Conditions were controlled such that a range of amounts of Co, Ni, and Mn were incorporated. The incorporation was tracked by color changes in the white ZnO powder to blue for Co, green for Ni and yellow for Mn. XRD measurements showed the nanoparticles were on ...


A Population Model For Walleye In Nebraska Irrigation Reservoirs, Robert A. Kill Dec 2013

A Population Model For Walleye In Nebraska Irrigation Reservoirs, Robert A. Kill

Dissertations & Theses in Natural Resources

Understanding how and why fish population size changes between years is a central theme in fisheries ecology. Fishery agencies have limited time and financial resources, thus there is a need for a quantitative way to direct the limited time and financial resources so agencies can manage fisheries more efficiently. I developed a tool for fishery managers that synthesizes common population indices and evaluated the relative importance of those indices given varying uncertainty in age-0 walleye Sander vitreus survival. Under most circumstances, I determined that resources are best utilized in reducing age-0 survival uncertainty when understanding walleye population growth. I applied ...


Determining Scaphirhynchus Sturgeon Population Demographics And Dynamics: Implications For Range-Wide Management, Recovery, And Conservation, Martin J. Hamel Dec 2013

Determining Scaphirhynchus Sturgeon Population Demographics And Dynamics: Implications For Range-Wide Management, Recovery, And Conservation, Martin J. Hamel

Dissertations & Theses in Natural Resources

Sturgeons (Acipenseridae) have experienced world-wide declines as a result of anthropogenic effects such as over-harvest, habitat degradation, altered flow regimes, and pollution. Nearly all European and Asian sturgeon species have experienced population declines and have subsequently been classified as either threatened or endangered. North American sturgeons have experienced a similar plight in that all eight native sturgeon species are listed as endangered, threatened, or of special concern. Direct linkages between North American sturgeon declines and anthropogenic effects are difficult to assess due to scale considerations, fluctuating environmental conditions, difficulty in capture, and the interaction of all these effects. To recover ...


Research: South Dakota State University, Winter 2013, Christie Delfanian, Matt Landwehr Dec 2013

Research: South Dakota State University, Winter 2013, Christie Delfanian, Matt Landwehr

Research: South Dakota State University

CONTENTS:

South Dakota expertise integral part of Landsat [Page] 1
West Nile: Researchers help public health officials combat West Nile virus [page] 2
Health care: arteries, corticosteroids, concussions, and preemies [Page] 4
Oilseeds [Page] 6
Undergraduate Research [Page] 8
Organ donation key to helping Native Americans on dialysis [Page] 10
Researchers meet challenge of increased competition: 2012 measurements [Page] 11


Assessing The Biodiversity And Susceptibility Of Trees In Maxwell Park To Future Invasive Tree Pest Outbreaks, Genevieve Alexander '14 Dec 2013

Assessing The Biodiversity And Susceptibility Of Trees In Maxwell Park To Future Invasive Tree Pest Outbreaks, Genevieve Alexander '14

Outstanding Senior Seminar Papers

The purpose of this project was to assess tree susceptibility to invasive tree pest outbreaks in a Central-Illinois urban park. Tree biodiversity in Maxwell Park, located in the Town of Normal, Illinois, was evaluated assuming that the greater the tree biodiversity in a park, the more resilient the park would be to future invasive tree pest outbreaks. The Town of Normal Parks and Recreation Department served as the community partner for this project. By determining Maxwell Park’s current level of biodiversity, proposed new trees for future replacement plantings could be identified to help increase biodiversity and decrease the potential ...


The North American Carbon Program Multi-Scale Synthesis And Terrestrial Model Intercomparison Project – Part 1: Overview And Experimental Design, D. N. Huntzinger, C. Schwalm, A, M, Michalak, K. Schaefer, A. W. King, Y. Wei, A. Jacobson, S. Liu, R. B. Cook, W. M. Post, G. Berthier, D Hayes, M. Huang, A. Ito, H. Lei, Chaoqun (Crystal) Lu, J. Mao, C. H. Peng, S. Peng, B. Poulter, D. Ricciuto, X. Shi, Hanqin Tian, W. Wang, N. Zeng, F. Zhao, Q. Zhu Dec 2013

The North American Carbon Program Multi-Scale Synthesis And Terrestrial Model Intercomparison Project – Part 1: Overview And Experimental Design, D. N. Huntzinger, C. Schwalm, A, M, Michalak, K. Schaefer, A. W. King, Y. Wei, A. Jacobson, S. Liu, R. B. Cook, W. M. Post, G. Berthier, D Hayes, M. Huang, A. Ito, H. Lei, Chaoqun (Crystal) Lu, J. Mao, C. H. Peng, S. Peng, B. Poulter, D. Ricciuto, X. Shi, Hanqin Tian, W. Wang, N. Zeng, F. Zhao, Q. Zhu

Chaoqun (Crystal) Lu

Terrestrial biosphere models (TBMs) have become an integral tool for extrapolating local observations and understanding of land–atmosphere carbon exchange to larger regions. The North American Carbon Program (NACP) Multi-scale synthesis and Terrestrial Model Intercomparison Project (MsTMIP) is a formal model intercomparison and evaluation effort focused on improving the diagnosis and attribution of carbon exchange at regional and global scales. MsTMIP builds upon current and past synthesis activities, and has a unique framework designed to isolate, interpret, and inform understanding of how model structural differences impact estimates of carbon uptake and release. Here we provide an overview of the MsTMIP ...


Success Stories In Sustainable Agriculture: Dream To Farm, Leopold Center For Sustainable Agriculture Dec 2013

Success Stories In Sustainable Agriculture: Dream To Farm, Leopold Center For Sustainable Agriculture

Leopold Center Publications and Papers

One of our Success Stories in Sustainable Agriculture, this publication is a case study about a course created and offered at Iowa Western Community College to prepare students to produce food on small parcels of land for local markets.